. 2014 Aug 28;1(4):166–171. doi: 10.1093/nop/npu021

Table 2.

Univariate and multivariate analyses of the entire GBM population

Variable	Factor	n	Univariate Analysis			Multivariate Analysis
			Hazard Ratio		P Value	Hazard Ratio		P Value
			Estimate	95% CI	P Value	Estimate	95% CI	P Value
Age, y	29.4–83.9	267	1.040	1.025–1.056	<.0001	1.024	1.009–1.040	.0017
KPS, %	100	38	0.319	0.201–0.505	<.0001	0.473	0.294–0.760	.0020
KPS, %	≤90	229	0.319	0.201–0.505	<.0001	0.473	0.294–0.760	.0020
Extent of surgery	Complete	98	0.300^a	0.205–0.439	<.0001	0.383^a	0.259–0.566	<.0001
	Partial	121	0.565^a	0.397–0.804		0.604^a	0.424–0.860
	Biopsy	47
Postsurgical radiotherapy	Yes	211	0.112	0.078–0.160	<.0001	0.166	0.114–0.242	<.0001
Postsurgical radiotherapy	No	56	0.112	0.078–0.160	<.0001	0.166	0.114–0.242	<.0001

^a“biopsy” is the reference class for the Hazard Ratio.

Abbreviation: CI, confidence interval.